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- EMDB-62494: Cryo-EM structure of RNF168'-RNF168-UbcH5c complex bound to nucleosome -

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Basic information

Entry
Database: EMDB / ID: EMD-62494
TitleCryo-EM structure of RNF168'-RNF168-UbcH5c complex bound to nucleosome
Map dataCryo-EM structure of RNF168'-RNF168-UbcH5c-nucleosome complex
Sample
  • Complex: RNF168'-RNF168-UbcH5c-nucleosome complex
    • Protein or peptide: Histone H3
    • Protein or peptide: Histone H4
    • Protein or peptide: Histone H2A
    • Protein or peptide: Histone H2B
    • DNA: DNA (147-MER)
    • DNA: DNA (147-MER)
    • Protein or peptide: E3 ubiquitin-protein ligase RNF168
  • Ligand: ZINC ION
KeywordsDNA repair / Histone ubiquitination / Nucleosome / E3 ubiquitin-protein ligase / RNF168 / DNA BINDING PROTEIN/DNA / DNA BINDING PROTEIN-DNA complex
Function / homology
Function and homology information


histone H2AK15 ubiquitin ligase activity / histone ubiquitin ligase activity / double-strand break repair via classical nonhomologous end joining / isotype switching / K63-linked polyubiquitin modification-dependent protein binding / response to ionizing radiation / DNA repair-dependent chromatin remodeling / negative regulation of transcription elongation by RNA polymerase II / protein K63-linked ubiquitination / ubiquitin ligase complex ...histone H2AK15 ubiquitin ligase activity / histone ubiquitin ligase activity / double-strand break repair via classical nonhomologous end joining / isotype switching / K63-linked polyubiquitin modification-dependent protein binding / response to ionizing radiation / DNA repair-dependent chromatin remodeling / negative regulation of transcription elongation by RNA polymerase II / protein K63-linked ubiquitination / ubiquitin ligase complex / interstrand cross-link repair / SUMOylation of DNA damage response and repair proteins / nucleosome binding / positive regulation of DNA repair / epigenetic regulation of gene expression / ubiquitin binding / Nonhomologous End-Joining (NHEJ) / G2/M DNA damage checkpoint / RING-type E3 ubiquitin transferase / double-strand break repair via nonhomologous end joining / ubiquitin-protein transferase activity / structural constituent of chromatin / nucleosome / heterochromatin formation / double-strand break repair / nucleosome assembly / Recruitment and ATM-mediated phosphorylation of repair and signaling proteins at DNA double strand breaks / site of double-strand break / Processing of DNA double-strand break ends / ubiquitin-dependent protein catabolic process / histone binding / protein ubiquitination / protein heterodimerization activity / DNA damage response / chromatin binding / protein-containing complex / DNA binding / zinc ion binding / nucleoplasm / nucleus / cytosol
Similarity search - Function
E3 ubiquitin-protein ligase RNF168 / : / Prokaryotic RING finger family 4 / Ring finger / : / Histone H2B signature. / Histone H2A conserved site / Histone H2A signature. / Histone H2B / Histone H2B ...E3 ubiquitin-protein ligase RNF168 / : / Prokaryotic RING finger family 4 / Ring finger / : / Histone H2B signature. / Histone H2A conserved site / Histone H2A signature. / Histone H2B / Histone H2B / Histone H2A, C-terminal domain / C-terminus of histone H2A / Histone 2A / Histone H2A / TATA box binding protein associated factor / TATA box binding protein associated factor (TAF), histone-like fold domain / Histone H4, conserved site / Histone H4 signature. / Histone H4 / Histone H4 / CENP-T/Histone H4, histone fold / Centromere kinetochore component CENP-T histone fold / Zinc finger RING-type profile. / Zinc finger, RING-type / Histone H3 signature 1. / Histone H3 signature 2. / Histone H3 / Histone H3/CENP-A / Histone H2A/H2B/H3 / Core histone H2A/H2B/H3/H4 domain / Histone-fold / Zinc finger, RING/FYVE/PHD-type
Similarity search - Domain/homology
Histone H3 / Histone H2B / Histone H4 / Histone H2A / E3 ubiquitin-protein ligase RNF168
Similarity search - Component
Biological speciesHomo sapiens (human) / Xenopus laevis (African clawed frog)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.9 Å
AuthorsZhu HQ
Funding support China, 1 items
OrganizationGrant numberCountry
National Science Foundation (NSF, China) China
CitationJournal: Nucleic Acids Res / Year: 2025
Title: AlphaFold-guided structural analyses of nucleosome binding proteins.
Authors: Xin Yang / Haoqiang Zhu / Liuxin Shi / Tingrui Song / Weibin Gong / Shunmin He / Shan Shan / Chunfu Xu / Zheng Zhou /
Abstract: The nucleosome, as the fundamental unit of chromatin, interacts with a diverse range of proteins, crucially regulating gene expression. In this study, we introduce an AlphaFold-based algorithm ...The nucleosome, as the fundamental unit of chromatin, interacts with a diverse range of proteins, crucially regulating gene expression. In this study, we introduce an AlphaFold-based algorithm designed to analyze nucleosome-binding proteins from a dataset of over 7600 human nuclear proteins. Using proteins that interact with the nucleosome acidic patch as a benchmark, our screening achieves a successful prediction rate of 77% (23 out of 30 proteins). This predictive approach has led to the identification of ARID4A and ARID4B as novel nucleosome-binding proteins. Additionally, this analytical method was used to study RING-family ubiquitin E3 ligase RNF168, demonstrating that RNF168 dimerization enhances its binding to the nucleosome, a finding confirmed by cryogenic-electron microscopy structural analysis. Our findings offer a rapid and effective method for the discovery and characterization of nucleosome-binding proteins and emphasize the significant role of ubiquitin E3 ligase dimerization in epigenetic regulation.
History
DepositionNov 25, 2024-
Header (metadata) releaseNov 12, 2025-
Map releaseNov 12, 2025-
UpdateNov 12, 2025-
Current statusNov 12, 2025Processing site: PDBc / Status: Released

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Structure visualization

Supplemental images

emd_62494.png

Downloads & links

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Map

FileDownload / File: emd_62494.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationCryo-EM structure of RNF168'-RNF168-UbcH5c-nucleosome complex
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.07 Å/pix.
x 256 pix.
= 273.92 Å		1.07 Å/pix.
x 256 pix.
= 273.92 Å		1.07 Å/pix.
x 256 pix.
= 273.92 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.07 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 2.73
Minimum - Maximum-0.16318884 - 23.623190000000001
Average (Standard dev.)0.02333297 (±0.5271985)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 273.92 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: Half-map of RNF168'-RNF168-UbcH5c-nucleosome complex

Fileemd_62494_half_map_1.map
AnnotationHalf-map of RNF168'-RNF168-UbcH5c-nucleosome complex
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half-map of RNF168'-RNF168-UbcH5c-nucleosome complex

Fileemd_62494_half_map_2.map
AnnotationHalf-map of RNF168'-RNF168-UbcH5c-nucleosome complex
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : RNF168'-RNF168-UbcH5c-nucleosome complex

EntireName: RNF168'-RNF168-UbcH5c-nucleosome complex
Components
  • Complex: RNF168'-RNF168-UbcH5c-nucleosome complex
    • Protein or peptide: Histone H3
    • Protein or peptide: Histone H4
    • Protein or peptide: Histone H2A
    • Protein or peptide: Histone H2B
    • DNA: DNA (147-MER)
    • DNA: DNA (147-MER)
    • Protein or peptide: E3 ubiquitin-protein ligase RNF168
  • Ligand: ZINC ION

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Supramolecule #1: RNF168'-RNF168-UbcH5c-nucleosome complex

SupramoleculeName: RNF168'-RNF168-UbcH5c-nucleosome complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#7
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Histone H3

MacromoleculeName: Histone H3 / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Xenopus laevis (African clawed frog)
Molecular weightTheoretical: 15.30393 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString:
ARTKQTARKS TGGKAPRKQL ATKAARKSAP ATGGVKKPHR YRPGTVALRE IRRYQKSTEL LIRKLPFQRL VREIAQDFKT DLRFQSSAV MALQEASEAY LVALFEDTNL CAIHAKRVTI MPKDIQLARR IRGERA

UniProtKB: Histone H3

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Macromolecule #2: Histone H4

MacromoleculeName: Histone H4 / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Xenopus laevis (African clawed frog)
Molecular weightTheoretical: 11.263231 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString:
SGRGKGGKGL GKGGAKRHRK VLRDNIQGIT KPAIRRLARR GGVKRISGLI YEETRGVLKV FLENVIRDAV TYTEHAKRKT VTAMDVVYA LKRQGRTLYG FGG

UniProtKB: Histone H4

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Macromolecule #3: Histone H2A

MacromoleculeName: Histone H2A / type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Xenopus laevis (African clawed frog)
Molecular weightTheoretical: 13.978241 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString:
SGRGKQGGKT RAKAKTRSSR AGLQFPVGRV HRLLRKGNYA ERVGAGAPVY LAAVLEYLTA EILELAGNAA RDNKKTRIIP RHLQLAVRN DEELNKLLGR VTIAQGGVLP NIQSVLLPKK TESSKSAKSK

UniProtKB: Histone H2A

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Macromolecule #4: Histone H2B

MacromoleculeName: Histone H2B / type: protein_or_peptide / ID: 4 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Xenopus laevis (African clawed frog)
Molecular weightTheoretical: 13.524752 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString:
AKSAPAPKKG SKKAVTKTQK KDGKKRRKTR KESYAIYVYK VLKQVHPDTG ISSKAMSIMN SFVNDVFERI AGEASRLAHY NKRSTITSR EIQTAVRLLL PGELAKHAVS EGTKAVTKYT SAK

UniProtKB: Histone H2B

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Macromolecule #7: E3 ubiquitin-protein ligase RNF168

MacromoleculeName: E3 ubiquitin-protein ligase RNF168 / type: protein_or_peptide / ID: 7 / Number of copies: 1 / Enantiomer: LEVO / EC number: RING-type E3 ubiquitin transferase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 11.802692 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString:
MALPKDAIPS LSECQCGICM EILVEPVTLP CNHTLCKPCF QSTVEKASLC CPFCRRRVSS WTRYHTRRNS LVNVELWTII QKHYPRECK LRASGQESEE VADD

UniProtKB: E3 ubiquitin-protein ligase RNF168

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Macromolecule #5: DNA (147-MER)

MacromoleculeName: DNA (147-MER) / type: dna / ID: 5 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 45.13877 KDa
SequenceString: (DA)(DT)(DC)(DG)(DA)(DG)(DA)(DA)(DT)(DC) (DC)(DC)(DG)(DG)(DT)(DG)(DC)(DC)(DG)(DA) (DG)(DG)(DC)(DC)(DG)(DC)(DT)(DC)(DA) (DA)(DT)(DT)(DG)(DG)(DT)(DC)(DG)(DT)(DA) (DG) (DA)(DC)(DA)(DG)(DC)(DT) ...String:
(DA)(DT)(DC)(DG)(DA)(DG)(DA)(DA)(DT)(DC) (DC)(DC)(DG)(DG)(DT)(DG)(DC)(DC)(DG)(DA) (DG)(DG)(DC)(DC)(DG)(DC)(DT)(DC)(DA) (DA)(DT)(DT)(DG)(DG)(DT)(DC)(DG)(DT)(DA) (DG) (DA)(DC)(DA)(DG)(DC)(DT)(DC)(DT) (DA)(DG)(DC)(DA)(DC)(DC)(DG)(DC)(DT)(DT) (DA)(DA) (DA)(DC)(DG)(DC)(DA)(DC)(DG) (DT)(DA)(DC)(DG)(DC)(DG)(DC)(DT)(DG)(DT) (DC)(DC)(DC) (DC)(DC)(DG)(DC)(DG)(DT) (DT)(DT)(DT)(DA)(DA)(DC)(DC)(DG)(DC)(DC) (DA)(DA)(DG)(DG) (DG)(DG)(DA)(DT)(DT) (DA)(DC)(DT)(DC)(DC)(DC)(DT)(DA)(DG)(DT) (DC)(DT)(DC)(DC)(DA) (DG)(DG)(DC)(DA) (DC)(DG)(DT)(DG)(DT)(DC)(DA)(DG)(DA)(DT) (DA)(DT)(DA)(DT)(DA)(DC) (DA)(DT)(DC) (DC)(DG)(DA)(DT)

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Macromolecule #6: DNA (147-MER)

MacromoleculeName: DNA (147-MER) / type: dna / ID: 6 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 45.610043 KDa
SequenceString: (DA)(DT)(DC)(DG)(DG)(DA)(DT)(DG)(DT)(DA) (DT)(DA)(DT)(DA)(DT)(DC)(DT)(DG)(DA)(DC) (DA)(DC)(DG)(DT)(DG)(DC)(DC)(DT)(DG) (DG)(DA)(DG)(DA)(DC)(DT)(DA)(DG)(DG)(DG) (DA) (DG)(DT)(DA)(DA)(DT)(DC) ...String:
(DA)(DT)(DC)(DG)(DG)(DA)(DT)(DG)(DT)(DA) (DT)(DA)(DT)(DA)(DT)(DC)(DT)(DG)(DA)(DC) (DA)(DC)(DG)(DT)(DG)(DC)(DC)(DT)(DG) (DG)(DA)(DG)(DA)(DC)(DT)(DA)(DG)(DG)(DG) (DA) (DG)(DT)(DA)(DA)(DT)(DC)(DC)(DC) (DC)(DT)(DT)(DG)(DG)(DC)(DG)(DG)(DT)(DT) (DA)(DA) (DA)(DA)(DC)(DG)(DC)(DG)(DG) (DG)(DG)(DG)(DA)(DC)(DA)(DG)(DC)(DG)(DC) (DG)(DT)(DA) (DC)(DG)(DT)(DG)(DC)(DG) (DT)(DT)(DT)(DA)(DA)(DG)(DC)(DG)(DG)(DT) (DG)(DC)(DT)(DA) (DG)(DA)(DG)(DC)(DT) (DG)(DT)(DC)(DT)(DA)(DC)(DG)(DA)(DC)(DC) (DA)(DA)(DT)(DT)(DG) (DA)(DG)(DC)(DG) (DG)(DC)(DC)(DT)(DC)(DG)(DG)(DC)(DA)(DC) (DC)(DG)(DG)(DG)(DA)(DT) (DT)(DC)(DT) (DC)(DG)(DA)(DT)

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Macromolecule #8: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 8 / Number of copies: 2 / Formula: ZN
Molecular weightTheoretical: 65.409 Da

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.5
VitrificationCryogen name: ETHANE / Chamber humidity: 100 %

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.3000000000000003 µm / Nominal defocus min: 1.8 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: NONE
Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.9 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 58069
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: PROJECTION MATCHING
FSC plot (resolution estimation)

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